@Yannis-Belouris said in Data quality: Something is off in the altitude chart in SA. Anyone noticed something similar? S9 and MC seem fine [image: 1538134629885-screenshot_20180928-133547_firefox-beta-resized.jpg] [image: 1538134745990-20180928_133838-resized.jpg] [image: 1538134763412-screenshot_20180928-122132_suunto-resized.jpg] Yes I’ve noticed the same! I like a problem with the scales.